God had Hosea marry a prosititute . I can only imagine what Hosea what thinking. He probably was thinking why me. He probably was even shocked when God asked him. He probably was thinking God are you really serious you want to marry a prosititute. I believe God was trying trying to Hosea how he was going to restore Isreal through him marrying Gomer. God was using Gomer as a illustration to show Hosea how far away from God Isreal had truly become.God was showing him how he was using Gomer as a bridge to bring Isreal back to him. He can draw us back to him as did with Gomer.